Gerald Massey was an eminent and independent Egyptologist. He has researched and documented many features and symbols of Egyptian religion and myth in comparison with Christian symbols and stories.
He was important to Alvin Boyd Kuhn who took Massey's work one step further as portrayed in "The Pagan Christ" from Tom Harpur. It seems that christianity is to a large extent a copy of pagan religion and myth. If this work serves to give some understanding of the original Gnostic themes in Christianity then it will have done its work!